Bad news, Linux fans. The older PlayStation 3 consoles are losing one of the features they could tout over their Slim successor. Firmware 3.21 is coming out this Thursday, April 1st, and its major raison d'être is to kill the "install other OS" option. (This is "not an April fools joke," as the PS Europe blog elaborates.) Those who wish to keep Yellow Dog or Fedora running can opt to not upgrade, but skipping out means losing the ability to access PlayStation Network and play games online, among oth